Sugar-beet-cleaning screen



A. 6.1. RAPP.

SUGAR BEET CLEANING SCREEN.

APPLICATION FILED DEC.I5, 1921.

A. G. 1. RAPP.

SUGAR BEET CLEANING SCREEN.

APPLICATION man nec. 15. 1921.

Patented Oct. 1N, 1922..

3 SHEETS-SHEET 2.

A. 6.1. RAPP.

SUGAR BEET CLEANING VSCREEN APPLICATION FILED DEc.I5. 1921.

Lm men-md oet. 10,1922',

3 SHEETS-SHEET 3.

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AXEL Gr. .T RAPR 0F CHXCAGO, LLINOIS, ASSIGNOR 'IO LINK-BELT COMPANY, 0F

i CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS,

SUGAR-BEETCLEANI1\TG SCREEN.

Application iled December 15, 1921. Serial No. 522,638.

To all @07mm t may concern.'

Be it known that l, AXEL G. J. RAPP, a citizen of the United States, residing at Chicago, in the county oi:L Cook and State of illinois, have invented a certain new and useful improvement in clugar-Beet-Cleaning Screens, of which the following is a specification., y

i My invention relates to improvements in sugar beet cleaning screens, and has for one object to provide a new and improved form ot `screen which will ybe easy, simple and cheap to construct, and wherein those parts likely to need replacement can be easily and quickly renewed without dismantling the machine and without materially interfering with its operation.

Another object is to provide asugar beet cleaning screen which will be self-cleaning and which will remove dirt from beets with maximum efficiency.

@ther objects of my invention will appear from time to time throughout the course of the specifications and claims. i

By my arrangement I provide `a screening drum made of a series of separate loosely held transverse cleaning bars. The fact that these bars are loosely held and :tree to rattleabout slightly in the frame avoids the tendency for dirt to cake between the bars and enables the bars4 themselves to shake halted dirt loose. i i

The arrangement is suchthat if a bar is bent or broken, 'it is onlynecessary to insert a new bar into the holes occupied by the old one and to bend the ends to hold thel barrin place, or the bar with bent ends can be sprung into place. i

The spaces between the bars extendingin the direction of movement of `the beets or other material being separated as it travels along the rotating screen provide for a free and smooth travel of material as it contin nally rotates and makes itz-possible ior the beets themselves to assist in cleaningv the screen. Y

My invention is illustrated more or less diagrammatically in the vfollowing draw ings, wherein: i i, i

Figure l is a side elevation of the screen; 4Figure Q'is a view of the receiving end with the supply chute removed;

the

Figure 3 is, a view of the discharge end with the discharge chute removed;

'Figure il is a section along the linee-4 of Figure l; y

Figure 5 is a detail section along the line 5 5 of Figure l;

Figure 6 is a detail section along the'line 6 6 of, Figure l.

Like parts are indicated by like characters throughout.

A is a main bed frame, carrying pillow blocks A, A', in which are rotatably mounted the roller shafts A2, A2. These shafts have on their ends mitre gears A3 in mesh with mitre gears A4' on the driving shaft A, which is driven from any suitable source of power by a drive pulley AG. A7, A7 are supporting rollers on the roller shafts A2, A2, in frictional engagement with the supporting rings AS, A9, whereby power applied to the machine itself causes the supporting rings and screen to rotate by the trictional engagement between the rollers A7 and rings A8. y y

Rings A8, A9, have inwardly extending lugs B, on which are bolted the longitudinally disposed "l" bars B', B, parallel with the axis of rotation of the screen. The two inner flanges of these 'l' bars have each longitudinally disposed rows of perforations B2, B2. Screen bars B3, B3, engage these perlorations, the ends ,et y bars beingl bent y outwardly at lll, llji, 'roughly into parallelism with the stem o'lt the ul", so that these bars, which are smaller in diameter than the holes B, are held at their ends in those holesloosely, but are unable` to escape l'roni them. ln the preferred i'orm as shown, these bars are slightly inclined so as to give a spiral arrangement ci the bars about the periphery of the drum, but obviously this yinclination might vary in degree, and under some conditions the bars might preferably be perpendicular to the axis of rotation. The bent ends of these bars penetrate through the "lf flanges so as to provide little, if any, lobstruction for the free flow of the material down one bank of bars, across the base of the 'l' and onto the next bank or row or" bars. B5 are liller plates bolted to the lugs B in the same plane as the bars, so as to continue the support. ot

beets until they are discharged from the drum on to the discharge sleeve B, mounted on the ring A9. BT is a chute into which the beets are discharged from the sleeve BG. BS is a feed chute through which the dirty beets arepdischarged into the screen. B9 is an inwardly extending annular guard ring mounted on the ring AS and engaging the edges of the members B5 on the up side so as to protect the operating mechanism.

The screening drum is slightly inclined as indicated and limited in its downward movement `by a roller C, which is mounted on the 'traine A and emgages the down side of the ring A. The operation of the device will be obvious ata glance. The dirt-laden beets, which must be separated from dirt before shipment, or treatment, are fed into the drum and as the drum rotates, the beets travel down on to the slight incline of the drum and to the spiral arrangement of the bars. rlhe polygonal cross section ot' the drum causes the beets to roll upon one another and to change direction with some suddenness and dirt and foreign material is discharged from between the bars into any suitable chute or hopper, C', hence the material carried oif in any desirable way, and the cleaned separated beets are discharged into the discharge hopper.

It will be evident that while I have shown in my drawings an operative device, still nia-ny changes might be made in size, shape and arrangement of parts without departing materially from the spirit of my invention and I wish, therefore, that my drawings be considered as in a sense diagrammatic.

I claim:

v1. A rotary screen comprising a supporting frame and a plurality of separate loosely mounted screening elements supported at each end thereon.

2. A rotary screen comprising a supporting frame and a plurality of separate screen- Jforming elements, each loosely mount-ed on the frame and Supported at each end thereon.

rotary screen comprising a supporting frame and a plurality of screening bars, each separately loosely mounted in the frame and supported at 'each end thereon.

4. A rotary screen comprising two parallel perforated supporting members and separate screen-forming bars extending between said supporting members, having their ends penetrating said perforations.

5.` A rota-ry screen comprising two parallel perforated supporting members, and separate screen-forming bars extending between said supporting members, having their endsppenetrating said perforations, the ends of the Ybars being bent to prevent removal thereof.

6. A rotary screen comprising two parallel perforated supporting members and separate screen-terming bars extending between said supporting members, having their ends penetrating said pei-forations, the ends ol the bars being bent at the point where they penetrate said perfor-ations to prevent removal thereof.

7. A rotary screen comprising a supporting frame and a plurality of separate loosely mounted screening elements carried thereby, and supported at each end thereon and means iter moving the supporting :trame during the screening operation to rattle said loosely mounted members to prevent clogging oi' the screen.

8. A rotary screen comprising a supporting trame and. a plurality olI separate screenforming elements, each loosely mounted at each end on the frame, and means for moving the supporting fra-me during` the screening operation to rattle said loosely mounted members to prevent clogging ot the screen.

9. A rotary screen comprising a supporting frame and a plurality ot screening bars each separate from the others and separately and loosely mounted in the trame, and means ior moving the supporting l'ralne during the screening operation.

1t). A tubular screen, the side walls ot which are made up of a plurality ol plane panels inclined one to the other each panel comprising a plm'ality ol' loosely mounted elements.

11. A tubular screen, the side walls ol which are made up of a plurality olf plane panels inclined one to the other each panel comprising a plurality of loosely mounted elements, there being a series ot longitudinal screening apertures in each of said panels located in planes normal to and intersecting the axis of rotation olf the screen.

12. A tubular screen, the side walls ot which are made up ol a plurality of plane panels inclined one to the other cach panel comprising a plurality of loosely mounted elements, there ,being a series oi" longitudinal screening apertures in said panels located in planes generally parallel with the movement of material across the screen as the screen rotates.

13. In a tubular screen a plurality of plane panels comprising separate loosely mounted screen-forming elements generally normal to the axis of rotation.

14. In a tubular screen a plurality of plane panels comprising loosely mounted screen-forming rods generally normal to the axis' of rotation.

15. In a tubular screen a plurality of plane panels comprising separate screenforming rods generally normal to the axis of rotation, each of said rods being loosely mounted and free to move during the screening operation, with respect to its neighbor under the impact of material being screened,

and as a result of rotation of the screen to prevent the deposition of clogging material between the rods.

16. A rotary screen comprising a plurality of annular supporting rings, a plurality of `longitudinal members joining them, a plu-` rality of separate screening bars loosely mounted at their ends on said members to form screen panels 4between them.

` 17. A rotary screen comprising a plurality of annular supporting rings, a plurality of longitudinal members joining them, a plurality of separate screening' bars loosely mounted at their ends on said members to form screen panels between them, the rods being slightly inclined to form a series of spiraln slots about the periphery ofthe screen cylinder. i

18. A rotary screen comprising a plurality of annular supporting rings, a plurality of longitudinal members joining them, a plurality of separate screening bars loosely mounted at their ends on said members to form screen. panels between them, the longitudinal members being perforated, the

`screening bars loosely held within said perforations.

19. A rotary screen comprising a plural ity` of annular supporting rings, a plurality of longitudinal membersjoining them, a plurality of separate screening bars loosely mounted at their` ends on said members to form screen panels between them, the longitudinal members 'being perforated, the screening bars loosely held within said pen porations, the ends of the bars where they pass through said apertures being outwardly bent.

,members betweenthe ends of the bars forming adjacent screen banks.

21. A screen comprising a plurality of annular supporting rings, a plurality of longi- `tudinal members joining them, a plurality of separate screening bars loosely mounted at their ends on said members to form screen panels between them, the longitudinal members being perforated', the screening bars loosely hold within said perforations,.the ends of the bars where they pass through nasisfi i a..

said perforations being outwardly bent, there being a smooth surface of the longitudinal members between the ends of the bars forming adjacent screen banks.

22. A screen comprising a plurality of annular supporting rings, a plurality of longi tudinal nlshaped members joining them, the stem of the 'l' projecting` outwardly, a plurality of separate screening bars loosely mounted at their ends on said members to form screen panels between them.

23. A screen comprising a plurality of annular supporting rings, a plurality of longitudinal `l'sliaped members joining` them, the stem. of the 'l' projecting outwardly, the flanges of the "'l' being perforated, the ends of the screeningbars passing through the perforations and bent outwardly` along the stem of the 'l'.

24. A screen comprising a plurality of annular .supporting rings having opposed inwardly projecting lugs loi'igitudinal members attached to said lugs and connecting the rings, screening bars loosely mounted at their ends on the longitudinal members and forming screen banks between them and flat reinforcing plates connecting adjacent lug-s on each annular ring in continuation of the screen banks.

25. A screen comprising a supporting frame and means for passing material thereacross, and a plurality of screening bars, each separately and loosely mounted in the frame, said bars lying across the line of movement of the material to be screened.

26. A screen comprising a supporting frame and means for passing material thereacross, and a plurality of screening bars, each separately and loosely mounted in the frame, said frame comprising parallel perforated supporting elements, said screening bars having their ends penetrating said per foi-ations, said bars lying across the line of travel of the .material to be screened.

fl. screen comprising a vsupporting frame and means for passing material. theren across, and a plurality of screening bars, each separately and loosely mounted in the frame, said screening bars having their ends penetrating said perforations, said ends being bent at the point where they penetrate to prevent removal thereof, said bars lying across the line of travel of the material to be screened. j

Signed at Chicago, county of Cook, and

vState of Illinois, this 12th day of December,

AXEL G. J. RAPP.v

inc 

